Pour contents of the butternut squash package into a 2-quart microwave-safe baking dish with a lid. Add 2 tablespoons water. Cover. Microwave on 100 percent power (high) for 3 minutes. Stir. Microwave on 100 percent power (high) for 3 minutes more. Stir again. Microwave on 100 percent power (high) about 2 minutes more or until squash is very tender. Using a pastry blender or potato masher, mash squash.